string.h中怎么找不到对string的定义？

kzh 2006-07-12 10:31:00
书上说标准C的标准库中，将string定义为指针，但是我怎么在string.h中找不到这个定义啊？
下面是在VC6中找到的STRING.H的完整文件：

/***
*string.h - declarations for string manipulation functions
*
* Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
* This file contains the function declarations for the string
* manipulation functions.
* [ANSI/System V]
*
* [Public]
*
****/

#if _MSC_VER > 1000
#pragma once
#endif

#ifndef _INC_STRING
#define _INC_STRING

#if !defined(_WIN32) && !defined(_MAC)
#error ERROR: Only Mac or Win32 targets supported!
#endif


#ifdef __cplusplus
extern "C" {
#endif



/* Define _CRTIMP */

#ifndef _CRTIMP
#ifdef _DLL
#define _CRTIMP __declspec(dllimport)
#else /* ndef _DLL */
#define _CRTIMP
#endif /* _DLL */
#endif /* _CRTIMP */

/* Define __cdecl for non-Microsoft compilers */

#if ( !defined(_MSC_VER) && !defined(__cdecl) )
#define __cdecl
#endif

/* Define _CRTAPI1 (for compatibility with the NT SDK) */

#ifndef _CRTAPI1
#if _MSC_VER >= 800 && _M_IX86 >= 300
#define _CRTAPI1 __cdecl
#else
#define _CRTAPI1
#endif
#endif


#ifndef _SIZE_T_DEFINED
typedef unsigned int size_t;
#define _SIZE_T_DEFINED
#endif


#ifndef _MAC
#ifndef _WCHAR_T_DEFINED
typedef unsigned short wchar_t;
#define _WCHAR_T_DEFINED
#endif
#endif /* ndef _MAC */

#ifndef _NLSCMP_DEFINED
#define _NLSCMPERROR 2147483647 /* currently == INT_MAX */
#define _NLSCMP_DEFINED
#endif

/* Define NULL pointer value */

#ifndef NULL
#ifdef __cplusplus
#define NULL 0
#else
#define NULL ((void *)0)
#endif
#endif


/* Function prototypes */

#ifdef _M_MRX000
_CRTIMP void * __cdecl memcpy(void *, const void *, size_t);
_CRTIMP int __cdecl memcmp(const void *, const void *, size_t);
_CRTIMP void * __cdecl memset(void *, int, size_t);
_CRTIMP char * __cdecl _strset(char *, int);
_CRTIMP char * __cdecl strcpy(char *, const char *);
_CRTIMP char * __cdecl strcat(char *, const char *);
_CRTIMP int __cdecl strcmp(const char *, const char *);
_CRTIMP size_t __cdecl strlen(const char *);
#else
void * __cdecl memcpy(void *, const void *, size_t);
int __cdecl memcmp(const void *, const void *, size_t);
void * __cdecl memset(void *, int, size_t);
char * __cdecl _strset(char *, int);
char * __cdecl strcpy(char *, const char *);
char * __cdecl strcat(char *, const char *);
int __cdecl strcmp(const char *, const char *);
size_t __cdecl strlen(const char *);
#endif
_CRTIMP void * __cdecl _memccpy(void *, const void *, int, unsigned int);
_CRTIMP void * __cdecl memchr(const void *, int, size_t);
_CRTIMP int __cdecl _memicmp(const void *, const void *, unsigned int);

#ifdef _M_ALPHA
/* memmove is available as an intrinsic in the Alpha compiler */
void * __cdecl memmove(void *, const void *, size_t);
#else
_CRTIMP void * __cdecl memmove(void *, const void *, size_t);
#endif


_CRTIMP char * __cdecl strchr(const char *, int);
_CRTIMP int __cdecl _strcmpi(const char *, const char *);
_CRTIMP int __cdecl _stricmp(const char *, const char *);
_CRTIMP int __cdecl strcoll(const char *, const char *);
_CRTIMP int __cdecl _stricoll(const char *, const char *);
_CRTIMP int __cdecl _strncoll(const char *, const char *, size_t);
_CRTIMP int __cdecl _strnicoll(const char *, const char *, size_t);
_CRTIMP size_t __cdecl strcspn(const char *, const char *);
_CRTIMP char * __cdecl _strdup(const char *);
_CRTIMP char * __cdecl _strerror(const char *);
_CRTIMP char * __cdecl strerror(int);
_CRTIMP char * __cdecl _strlwr(char *);
_CRTIMP char * __cdecl strncat(char *, const char *, size_t);
_CRTIMP int __cdecl strncmp(const char *, const char *, size_t);
_CRTIMP int __cdecl _strnicmp(const char *, const char *, size_t);
_CRTIMP char * __cdecl strncpy(char *, const char *, size_t);
_CRTIMP char * __cdecl _strnset(char *, int, size_t);
_CRTIMP char * __cdecl strpbrk(const char *, const char *);
_CRTIMP char * __cdecl strrchr(const char *, int);
_CRTIMP char * __cdecl _strrev(char *);
_CRTIMP size_t __cdecl strspn(const char *, const char *);
_CRTIMP char * __cdecl strstr(const char *, const char *);
_CRTIMP char * __cdecl strtok(char *, const char *);
_CRTIMP char * __cdecl _strupr(char *);
_CRTIMP size_t __cdecl strxfrm (char *, const char *, size_t);

#ifdef _MAC
unsigned char * __cdecl _c2pstr(char *);
char * __cdecl _p2cstr(unsigned char *);

#if !__STDC__
__inline unsigned char * __cdecl c2pstr(char *sz) { return _c2pstr(sz);};
__inline char * __cdecl p2cstr(unsigned char *sz) { return _p2cstr(sz);};
#endif
#endif

#if !__STDC__

/* prototypes for oldnames.lib functions */
_CRTIMP void * __cdecl memccpy(void *, const void *, int, unsigned int);
_CRTIMP int __cdecl memicmp(const void *, const void *, unsigned int);
_CRTIMP int __cdecl strcmpi(const char *, const char *);
_CRTIMP int __cdecl stricmp(const char *, const char *);
_CRTIMP char * __cdecl strdup(const char *);
_CRTIMP char * __cdecl strlwr(char *);
_CRTIMP int __cdecl strnicmp(const char *, const char *, size_t);
_CRTIMP char * __cdecl strnset(char *, int, size_t);
_CRTIMP char * __cdecl strrev(char *);
char * __cdecl strset(char *, int);
_CRTIMP char * __cdecl strupr(char *);

#endif /* !__STDC__ */

(continue...)
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healer_kx 2006-07-12
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#include <string>
using namespace std;
lixiaosan 2006-07-12
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#include <string>
kzh 2006-07-12
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(continue...)

#ifndef _MAC
#ifndef _WSTRING_DEFINED

/* wide function prototypes, also declared in wchar.h */

_CRTIMP wchar_t * __cdecl wcscat(wchar_t *, const wchar_t *);
_CRTIMP wchar_t * __cdecl wcschr(const wchar_t *, wchar_t);
_CRTIMP int __cdecl wcscmp(const wchar_t *, const wchar_t *);
_CRTIMP wchar_t * __cdecl wcscpy(wchar_t *, const wchar_t *);
_CRTIMP size_t __cdecl wcscspn(const wchar_t *, const wchar_t *);
_CRTIMP size_t __cdecl wcslen(const wchar_t *);
_CRTIMP wchar_t * __cdecl wcsncat(wchar_t *, const wchar_t *, size_t);
_CRTIMP int __cdecl wcsncmp(const wchar_t *, const wchar_t *, size_t);
_CRTIMP wchar_t * __cdecl wcsncpy(wchar_t *, const wchar_t *, size_t);
_CRTIMP wchar_t * __cdecl wcspbrk(const wchar_t *, const wchar_t *);
_CRTIMP wchar_t * __cdecl wcsrchr(const wchar_t *, wchar_t);
_CRTIMP size_t __cdecl wcsspn(const wchar_t *, const wchar_t *);
_CRTIMP wchar_t * __cdecl wcsstr(const wchar_t *, const wchar_t *);
_CRTIMP wchar_t * __cdecl wcstok(wchar_t *, const wchar_t *);

_CRTIMP wchar_t * __cdecl _wcsdup(const wchar_t *);
_CRTIMP int __cdecl _wcsicmp(const wchar_t *, const wchar_t *);
_CRTIMP int __cdecl _wcsnicmp(const wchar_t *, const wchar_t *, size_t);
_CRTIMP wchar_t * __cdecl _wcsnset(wchar_t *, wchar_t, size_t);
_CRTIMP wchar_t * __cdecl _wcsrev(wchar_t *);
_CRTIMP wchar_t * __cdecl _wcsset(wchar_t *, wchar_t);

_CRTIMP wchar_t * __cdecl _wcslwr(wchar_t *);
_CRTIMP wchar_t * __cdecl _wcsupr(wchar_t *);
_CRTIMP size_t __cdecl wcsxfrm(wchar_t *, const wchar_t *, size_t);
_CRTIMP int __cdecl wcscoll(const wchar_t *, const wchar_t *);
_CRTIMP int __cdecl _wcsicoll(const wchar_t *, const wchar_t *);
_CRTIMP int __cdecl _wcsncoll(const wchar_t *, const wchar_t *, size_t);
_CRTIMP int __cdecl _wcsnicoll(const wchar_t *, const wchar_t *, size_t);

#if !__STDC__

/* old names */
#define wcswcs wcsstr

/* prototypes for oldnames.lib functions */
_CRTIMP wchar_t * __cdecl wcsdup(const wchar_t *);
_CRTIMP int __cdecl wcsicmp(const wchar_t *, const wchar_t *);
_CRTIMP int __cdecl wcsnicmp(const wchar_t *, const wchar_t *, size_t);
_CRTIMP wchar_t * __cdecl wcsnset(wchar_t *, wchar_t, size_t);
_CRTIMP wchar_t * __cdecl wcsrev(wchar_t *);
_CRTIMP wchar_t * __cdecl wcsset(wchar_t *, wchar_t);
_CRTIMP wchar_t * __cdecl wcslwr(wchar_t *);
_CRTIMP wchar_t * __cdecl wcsupr(wchar_t *);
_CRTIMP int __cdecl wcsicoll(const wchar_t *, const wchar_t *);

#endif /* !__STDC__ */

#define _WSTRING_DEFINED
#endif

#endif /* ndef _MAC */

#ifdef __cplusplus
}
#endif

#endif /* _INC_STRING */
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